BMW 335i XDrive (2015) Air Intake Options

by Alex Braham 42 views

Hey guys! If you're looking to boost your 2015 BMW 335i xDrive's performance, upgrading the air intake system is a fantastic place to start. An aftermarket air intake can significantly improve airflow to your engine, resulting in increased horsepower, better throttle response, and even a more aggressive sound. Let's dive into the world of air intakes and see what options are available for your Bimmer.

Understanding Air Intakes: The Basics

Before we jump into specific models, let's cover the basics of what an air intake does. The factory air intake system on your BMW is designed to filter incoming air and deliver it to the engine. However, these stock systems are often restrictive to keep noise levels down and meet emissions regulations. An aftermarket air intake replaces the factory system with a less restrictive design, allowing your engine to breathe easier. This improved airflow can lead to a noticeable increase in power and a more engaging driving experience.

Key benefits of upgrading your air intake include:

  • Increased Horsepower and Torque: More air means more efficient combustion, which translates to more power.
  • Improved Throttle Response: Your engine will respond more quickly to your inputs.
  • Enhanced Engine Sound: Many aftermarket intakes provide a more aggressive and sporty sound.
  • Better Fuel Efficiency (Potentially): While not always guaranteed, a more efficient engine can sometimes lead to improved fuel economy.

When choosing an air intake, consider factors like filter type (oiled vs. dry), material (plastic vs. metal), and whether it's a short ram or cold air intake design. Each has its own pros and cons, which we'll explore further.

Types of Air Intakes for Your 335i xDrive

There are primarily two main types of air intakes you'll encounter: short ram intakes and cold air intakes.

Short Ram Intakes (SRIs)

Short ram intakes replace the factory airbox with a filter placed directly on the end of the intake pipe, usually within the engine bay. This design offers a more direct path for air to enter the engine, improving airflow. SRIs are generally easier to install than cold air intakes.

Pros of SRIs:

  • Easy Installation: Usually a straightforward bolt-on installation.
  • Improved Throttle Response: Noticeable improvement in how quickly the engine responds.
  • Aggressive Sound: SRIs often produce a louder and more pronounced intake sound.
  • Cost-Effective: Generally less expensive than cold air intakes.

Cons of SRIs:

  • Heat Soak: Because the filter is located in the engine bay, it can draw in hot air, potentially reducing power gains.
  • Less Power Gain Compared to CAIs: While they improve airflow, they may not provide the same peak power gains as cold air intakes.

Cold Air Intakes (CAIs)

Cold air intakes are designed to draw air from outside the engine bay, where the air is cooler. This is typically achieved by extending the intake pipe down into the fender well or behind the bumper. Cooler air is denser and contains more oxygen, which can lead to greater power gains.

Pros of CAIs:

  • Maximum Power Gains: By drawing in cooler air, CAIs can provide the most significant horsepower and torque increases.
  • Reduced Heat Soak: The filter is located away from the engine, minimizing the effects of heat soak.

Cons of CAIs:

  • More Difficult Installation: Installation can be more involved and may require removing parts of the bumper or fender liner.
  • Risk of Water Ingestion: If the filter is located too low, it could potentially suck in water during heavy rain or flooding.
  • More Expensive: CAIs are typically more expensive than short ram intakes.

Top Air Intake Brands for the 2015 BMW 335i xDrive

When it comes to choosing an air intake for your 335i xDrive, several reputable brands offer high-quality options. Here are a few of the most popular and trusted names in the aftermarket air intake industry:

  • aFe Power: aFe Power (Advanced Flow Engineering) is known for its high-performance air intakes, filters, and exhaust systems. They offer both short ram and cold air intake options for the 335i xDrive, designed for maximum airflow and power gains. Their products are well-engineered and often feature high-quality materials. Their intakes are designed for both performance and durability. With aFe Power, you're investing in a product that will last and deliver consistent results.

  • Injen Technology: Injen Technology is another leading manufacturer of performance air intakes and exhaust systems. They are known for their innovative designs and rigorous testing procedures. Injen offers a variety of intake options for the 335i xDrive, including short ram and cold air intakes, each engineered to optimize airflow and improve engine performance. Many enthusiasts appreciate Injen's attention to detail and the quality of their products. The company's dedication to research and development ensures that their intakes provide a noticeable performance boost.

  • K&N Engineering: K&N is perhaps the most well-known name in air filters and air intake systems. They offer a variety of replacement air filters and complete intake systems for the 335i xDrive. K&N filters are reusable and washable, making them a popular choice for those looking to save money in the long run. K&N intakes are designed to improve airflow while providing excellent filtration, protecting your engine from harmful contaminants. Their reputation for quality and performance is well-deserved, making them a reliable choice for your BMW.

  • Mishimoto: Mishimoto is a company that specializes in performance cooling and air intake products. They offer a range of products designed to improve the performance and reliability of your vehicle. Mishimoto air intakes are engineered for optimal airflow and feature high-quality construction. They are known for their attention to detail and commitment to producing top-notch products. If you're looking for an intake that combines performance with durability, Mishimoto is definitely worth considering.

  • Burger Motorsports (BMS): Burger Motorsports is a popular choice among BMW enthusiasts, particularly for their JB4 tuners and other performance modifications. They also offer air intakes for the 335i xDrive, designed to improve airflow and increase horsepower. BMS intakes are known for their ease of installation and impressive performance gains. They offer a cost-effective way to enhance your engine's performance without breaking the bank. Many users have reported noticeable improvements in throttle response and overall power after installing a BMS intake.

Choosing the Right Air Intake: Factors to Consider

Selecting the best air intake for your 2015 BMW 335i xDrive depends on several factors, including your budget, performance goals, and installation preferences. Here's a breakdown of the key considerations:

  • Performance Goals: Are you looking for maximum power gains or a more modest improvement in throttle response and sound? If you're after the most significant horsepower increase, a cold air intake is likely the better choice. If you prioritize ease of installation and a more aggressive sound, a short ram intake might be more suitable.

  • Budget: Air intakes can range in price from a couple hundred dollars to upwards of $500 or more. Determine how much you're willing to spend and choose an intake that fits your budget.

  • Installation: Some air intakes are easier to install than others. If you're comfortable working on your car, you can likely install a cold air intake yourself. If you're not mechanically inclined, you may want to consider having a professional install it.

  • Filter Type: Air filters come in two main types: oiled and dry. Oiled filters require periodic cleaning and re-oiling, while dry filters can be cleaned with soap and water. Consider which type of filter you prefer to maintain.

  • Climate: If you live in an area with heavy rain or flooding, you may want to avoid cold air intakes that position the filter too low to the ground.

Installation Tips and Considerations

Before you start the installation process, gather all the necessary tools and read the instructions carefully. Most air intake kits come with detailed instructions, but it's always a good idea to watch a few installation videos online to get a better understanding of the process.

Here are a few general tips to keep in mind:

  • Disconnect the Battery: Before working on any electrical components, disconnect the negative terminal of your battery to prevent shorts.
  • Take Your Time: Don't rush the installation process. Take your time and double-check your work to ensure everything is properly connected.
  • Use Proper Tools: Using the right tools will make the installation process much easier and prevent damage to your car.
  • Clean the Mass Air Flow (MAF) Sensor: When installing a new air intake, it's a good idea to clean the MAF sensor to ensure accurate readings.
  • Check for Leaks: After the installation is complete, start your engine and check for any air leaks around the intake connections.

Conclusion: Unleash Your BMW's Potential

Upgrading the air intake on your 2015 BMW 335i xDrive is a relatively simple modification that can deliver noticeable performance gains. By choosing the right air intake and following the installation instructions carefully, you can unlock your Bimmer's full potential and enjoy a more engaging driving experience. Whether you opt for a short ram intake or a cold air intake, you're sure to appreciate the improved throttle response, increased horsepower, and enhanced engine sound. So, go ahead and give your 335i xDrive the breath of fresh air it deserves!